Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 6 ones in any 4 X 4 X 4 subtriangle.
A153947
Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 6 ones in any 4 X 4 X 4 subtriangle.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =4a(4) =11a(5) =23a(6) =83a(7) =542a(8) =2154a(9) =15035a(10) =184615a(11) =1315991a(12) =16739106a(13) =377984235a(14) =5010747205a(15) =118406407922
External references
- oeis: A153947